Review on SUNLU PLA 3D Pen Filament Refills - 10 Bright Rainbow Colors, 164 Feet Total (50 Meters), 16.4 Feet Per Color (5 Meters), 1.75Mm For Most 3D Doodler Pens, Easy To Use & High Compatibility by Julio Rattanajatuphorn

I really didn't expect anything spectacular for a clear PLA, but I was wrong. This stuff printed perfect the first time out. And depending on how you slice, it will have some great effects.I did a test print of a wall hook I make with a 30% infill and then went ahead and designed a star for the top of my Christmas tree. I wanted a snowflake look when it was illuminated, and kept the infill at 30%. I am very happy with my design and the results. Placing one of the bulbs inside lights it up just fantastic.If you want really good transparency, keep your walls thin and print at 100% infill, you will be pleased with this.